Finding the Fourth Proportional to 2,115.02, 3,171.57 and 1,628.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.02 : 3,171.57 = 1,628.38 : x
2. Step 2: Convert to fraction form
   2,115.02/3,171.57 = 1,628.38/x
3. Step 3: Cross multiply
   2,115.02x = 3,171.57 × 1,628.38
4. Step 4: Simplify right side
   2,115.02x = 5,164,521.16
5. Step 5: Solve for x
   x = 5,164,521.16/2,115.02
6. Step 6: Final answer
   x = 2,441.83